I am looking at replacing the transmission modulator on my 75 F250, C6 and noticed that Napa shows three different ones that are all supposed to fit - all are adjustable.

White stripe
Green stripe
Black stripe

They do not seem to give any specs that would indicate what the difference is in the three. So, what are the differences in them?

 

I was wondering the same thing, I just bought a new purple modulator for my truck tonight, that's what it has on it so that's what's going back on it lol

 

Green stripe is light duty small block C6 app.

Black is Heavy duty/diesel trannys/big block


And green can't remember.